a fair-weather friend
Meaning: A fair-weather friend is a person who will only be your friend when things are going well for you.
- I had lots of friends when I was rich and successful, but when the money was gone it became clear that most were only fair-weather friends.
- Would she still want to know you if you were sick or in trouble, or is she just one of those fair-weather friends?
You'll find out who your fair-weather friends are when you get